Showing posts with label nebula. Show all posts
Showing posts with label nebula. Show all posts
Sunday, December 15, 2024
New Photo, Sharpless 115 in Cygnus
This Portion of sky covers less than a square degrees of sky in Constellation Cygnus, the Swan.
This star nursery has always looked to me like like it was cut out of the Baroque painting.
I was able to shoot a high resolution data for it with my new imaging setup. The Celestron Edge 14". This telescope has a beautiful optics and with a secondary mirror focuser, it'll hold the collimation perfectly all the time. Normally the heavy main mirror is used for focusing and it can be source of optical problems when it moves due to gravity when the scope is moving and pointing to a different portions of sky.
BAROQUE SKY OF SHARPLESS 115
Click for a full size photo, 2000x2000 pixels
A mapped color image from a light emitted by an ionized elements,
sulfur=red, hydrogen=green and oxygen=blue
sulfur=red, hydrogen=green and oxygen=blue
200% Enlarged Portion of the Full Resolution Photo
Click for a full size, 2000x2000 pixels
INFO
Sharpless 115 stands just north and west of Deneb, the alpha star of Cygnus, the Swan, in planet Earth's skies. Noted in the 1959 catalog by astronomer Stewart Sharpless (as Sh2-115) the faint but lovely emission nebula lies along the edge of one of the outer Milky Way's giant molecular clouds, about 7,500 light-years away.
Shining with the light of ionized atoms of hydrogen, sulfur, and oxygen in this Hubble palette color composite image, the nebular glow is powered by hot stars in star cluster Berkeley 90. The cluster stars are likely only 100 million years old or so and are still embedded in Sharpless 115. But the stars' strong winds and radiation have cleared away much of their dusty, natal cloud. At the emission nebula's estimated distance, this cosmic close-up spans just under 100 light-years.
Source: NASA APOD
Shining with the light of ionized atoms of hydrogen, sulfur, and oxygen in this Hubble palette color composite image, the nebular glow is powered by hot stars in star cluster Berkeley 90. The cluster stars are likely only 100 million years old or so and are still embedded in Sharpless 115. But the stars' strong winds and radiation have cleared away much of their dusty, natal cloud. At the emission nebula's estimated distance, this cosmic close-up spans just under 100 light-years.
Source: NASA APOD
Sharpless 115 in visual colors
Click for a full size photo, 2000x2000 pixels
sulfur=red, hydrogen=red and oxygen=blue, this combination is very close to a natural color palette.
Sh2-115 in a large context
Please, click for a large image, NOTE. 4000x5000 pixels
This is my very large mosaic photo of the whole Cygnus, more info about this massive photo
can be seen in this blog post, https://astroanarchy.blogspot.com/2021/12/cygnus-mosaic-gets-large.html
Technical details
Processing workflow
Image acquisition, MaximDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 27 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics,
Celestron EDGE 14" with 0.7 Focal reducer
Mount,
MesuMount Mark II
Cameras,
Imaging camera Apogee Alta U9000M and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AO Active Optics @ 5hz
filters,
Astrodon 5nm H-alpha, 3nm S-II and 3nm O-III
Total exposure time 12h
H-alpha, 18 x 1200 s, binned 1x1 = 6 h
O-III,9x 1200 s, binned 2x2 = 3h
S-II, 9 x 1200 s. binned 2x2 = 3h
A single calibrated 20 min exposure of H-alpha, Bin 1x1
Click for a full size image.
Monday, December 9, 2024
Wizard Nebula, NGC 7380
My new setup has a long focal length optics, Celestron EDGE 14", after years of shooting the wider field astronomical photos, it's very nice to dig in to the details of those cosmic wonders.
My new photo shows the Wizard nebula in Cepheus, I have shot this target many times with a various optical configurations. The combination of 14" telescope and large 12 micron pixels of my "new" second hand camera, Apogee Alta U9000M, delivers an optimal resolution to my seeing conditions (0.91 arcsecond/pixel). This makes possible to go very deep in relatively short cumulative exposure time, as can be seen in this photo. A dim background nebulosity stand out nicely after about six hours of H-alpha exposures.
WIZARD OF CEPHEUS
Click for a full size photo, 2000x2000 pixels
Click for a full size photo, 2000x2000 pixels
A mapped color image from a light emitted by an ionized elements,
sulfur=red, hydrogen=green and oxygen=blue
sulfur=red, hydrogen=green and oxygen=blue
The Wizard, as I see it
Click for a full size photo, 2000x2000 pixels
INFO
NGC 7380, the Wizard Nebula, locates in constellation Cepheus at distance of about 8500 light years from us. The Nebula surrounds an open star cluster NGC 7380. Stars, gas, and dust has created a shape that appears to some like a fictional medieval sorcerer. The active star forming region spans about 100 light years, making it appear larger than the angular extent of the Moon. The Wizard Nebula can be located with a small telescope toward the constellation of the King of Aethiopia (Cepheus).
WIZARD IN VISUAL COLORS
Click for a full size photo, 2000x2000 pixels
Click for a full size photo, 2000x2000 pixels
Visual color version from a light emitted by an ionized elements,
sulfur=red, hydrogen=red and oxygen=blue, this combination is very close to a natural color palette.
200% Enlarged Portion of the Full Resolution Photo
Click for a full size, 2000x2000 pixels
Technical details
Processing workflow
Image acquisition, MaximDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 27 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics,
Celestron EDGE 14" with 0.7 Focal reducer
Mount,
MesuMount Mark II
Cameras,
Imaging camera Apogee Alta U9000M and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AO Active Optics @ 5hz
filters,
Astrodon 5nm H-alpha, 3nm S-II and 3nm O-III
Total exposure time 12h
H-alpha, 18 x 1200 s, binned 1x1 = 6 h
O-III,9x 1200 s, binned 2x2 = 3h
S-II, 9 x 1200 s. binned 2x2 = 3h
A single, full scale, 20 min H-alpha exposure, Bin 1x1
Click for a full size image.
Click for a full size image.
Thursday, November 28, 2024
Beauty and the Beast, Tulip Nebula and a Black Hole
I started to collect exposures for this photo back in 2014, now I have shot new high resolution material for this amazing target with my new imaging platform.
I see several layers in my photos and that makes them to tell a story beyond any imagination.
First
A visual layer, that's naturally very important to me as a visual artist, revealing the hidden cosmic beauty and poetry is my passion.
Second
The physical layer, how emission of the nebulae works, radiation pressure, nuclear fusion of the star, gravitational phenomes, etc... all that is extremely beautiful in its own class.
Third
An existential layer, where we are coming and where we are going in a cosmic scale.
Practically all of the heavier elements in our bodies are coming from supernova explosion's, iron in our blood, oxygen, carbon, etc... We are children of the stars
When our Sun will die after few billion years and turn to a planetary nebula, it'll vaporize the Earth and our remains on it and blows them to the outer space. After aeons our remains are going to end up to a building blocks for a new generation of stars.
We all have been stars and one day we going to be stars again.
This is the beauty and poetry I'm after my photos
BEAUTY AND THE BEAST
Tulip Nebula and a Black Hole
Click the photo to see a high resolution photo, it's worth it
A two frame mosaic from a light emitted by an ionized elements,
sulfur=red, hydrogen=green and oxygen=blue
sulfur=red, hydrogen=green and oxygen=blue
One frame
Black Hole, Cygnus X-1, in a Close Up of the Full Resolution Photo
Click the photo to see a high resolution photo, it's worth it
Black Hole, Cygnus X-1, is marked in the photo
INFO
The complex and beautiful Tulip Nebula, Sharpless 101, blossoms about 8,000 light-years away toward the constellation of Cygnus the Swan. Ultraviolet radiation from young energetic stars ionizes the atoms and powers the emission from the Tulip Nebula.
Also in the featured field of view is the black hole Cygnus X-1, which is also a microquasar because it is one of strongest X-ray sources in planet Earth's sky. The powerful jets from the black hole can't be seen in this photo since they glow light in X-ray wave length. Faint bluish curved shock front, visible at up center, is coursed by the X-ray jet when it hits to a interstellar gas and dust.
Why we can see the black hole in this image as a star like object?
We can't see the actual black hole but we can see how the material is twirling in the black hole. The speed become so high that the matter starts to turn to an energy emitting light trough the whole spectrum up to X-ray and gamma radiation.
Photo in Visual Colors
Click the photo to see a high resolution photo, it's worth it
A two frame mosaic from a light emitted by an ionized elements,
sulfur=red, hydrogen=red and oxygen=blue
sulfur=red, hydrogen=red and oxygen=blue
Technical details
Processing workflow
Image acquisition, MaximDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 27 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics, Celestron EDGE 14" with 0.7 Focal reducer
Mount, MesuMount Mark II
Cameras, Imaging camera Apogee Alta U9000M and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AO Active Optics @ 5hz
filters, Astrodon 5nm H-alpha, 3nm S-II and 3nm O-III
Total exposure time 20h
H-alpha, 15 x 1200 s, binned 1x1 = 10 h
O-III, 45x 1200 s, binned 1x1 = 5 h
S-II, 9 x 1200 s. binned 2x2 = 5h
A single, full scale, 20 min H-alpha exposure, Bin 1x1
Click for a full scale image.
Click for a full scale image.
A single, full scale, 20 min O-III exposure, Bin 1x1
Click for a full scale image.
Click for a full scale image.
Tuesday, October 29, 2024
Methuselah Nebula, MWP1, project finalized
Planetary Nebulae are like candy of the cosmos, small and colorful treats to the eye.
MWP1 is a Planetary Nebula in constellation Cygnus, the Swan, it's rarely imaged and now I know why.
This is a unusually old, unusually shaped and unusually large planetary nebula, it also was one of the most difficult targets I have captured so far.
When I saw the first 20 min. exposure, it looked like there is plenty of nothing in the frame, this is dim to an extreme. I have added full size 20 min sub frames of H-alpha and O-III at the end of this blog post so you can see yourself how much data there is.
MWP1, Methuselah Nebula
Click for a full size image
Click for a full size image
Photo is in natural color palette from the light emitted by an ionized hydrogen (H-alpha)
and an ionized oxygen (O-III)
200% Enlarged Portion of the Full Resolution Photo
Click for a full size, 2000x2000 pixels
MWP1 in O-III light only
Click for a full size image
The structure of MWP1 in light of an ionized oxygen (O-III)
INFO
This is one of the largest planetary nebulae known, it spans about 15 light-years. Based on its expansion rate the nebula has an age of 150 thousand years, a cosmic blink of an eye in the 10 billion year life of a sun-like star. But planetary nebulae represent a very brief final phase in stellar evolution, as the nebula's central star shrugs off its outer layers to become a hot white dwarf. In fact, planetary nebulae ordinarily only last for 10 to 20 thousand years.
The central star of the nebula is on of the hottest stars known. It's so hot that it's producing large amounts of X-rays
Source NASA APOD
Scale in the Sky
The white circle show the apparent size of the Moon in the same scale, this is a large object as a Planetary nebula. Moon has a angular dimension of 30 arcminutes, that's 0.5 degrees.
Animation
Technical details
Processing workflow
Image acquisition, MaximDL
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2, Positive Constraint, 27 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics, Celestron EDGE 14" with 0.7 Focal reducer
Mount, MesuMount Mark II
Cameras, Imaging camera Apogee Alta U9000M and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AO Active Optics @ 5hz
filters, Astrodon 5nm H-alpha and 3nm O-III
Total exposure time 24h
H-alpha, 21 x 1200 s, binned 1x1 = 8 h
O-III, 48x 1200 s, binned 1x1 = 16h
A single, full size, 20 min H-alpha and O-III exposure
Click for a full scale image.
Both images below are jpg photos of a single full size, 20 min. FIT-format 16 bit image.
Photos are calibrated with darks and bias corrected flats and are heavily stretched to show even a hint of the actual nebula.
H-alpha
O-III
Tuesday, October 15, 2024
WR 134, The Rising Phoenix
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This is the second light for my new imaging setup, the first light image can be seen HERE
For years I have wanted to shoot a long focal length photo of this amazing mass ejecting star in constellation Cygnus, the Swan. Past five years I have done short focal length imaging with camera optics, now it's time to get closer.
I spent several clear nights to capture light emitted by an ionized elements in this gas formation. (H-alpha, S-II and O-III) For compositional reasons I ended up to a two panel mosaic image. Total exposure time is 23h.
When processing the final image I couldn't be noticing how much this formation looked like a mystical creature, the Phoenix Bird. I rarely use any other than official catalog numbers as a name of my photos but this time I simply had to name this composition to "Rising Phoenix".
When art meets science, the results can be beautiful. It can become something more than either of them on their own can ever be.
WR 134 as a Rising Phoenix
Click for a large image, 2500x1300 pixels photo shows the WR 134 like never seen before.
The photo is in mapped colors from an ionized elements, H-alpha=green, S-II=red and O-III=blue, Original resolution is 12.000 x 7000 pixels200% Enlarged Portion of the Full Resolution Photo
Click for a full size, 2000x2000 pixels
RISING PHOENIX PAREIDOLIA
Click for a large image
This image shows how I see the Phoenix Bird in this image
Info about the WR 134
WR 134 is a variable Wolf-Rayet star located around 6,000 light years away from us in the constellation of Cygnus. It's surrounded by a faint bubble of glowing ionized oxygen, blown out by the intense radiation and fast solar wind from the star. The star has five times the radius of the sun and it's 400,000 times more luminous.
My Wide Field Photo of the Area
Click for a large image, ~2500x2000 pixels
WR 134 can be seen just up left from the center, at right from the middle lays the Tulip Nebula,
Sh2-101. I took this narrowband photo with Tokina AT-X 300mm f2.8 camera lens @ full open.
The camera was a Apogee Alta U16 with an Astrodon narrowband filter set, exposure time around 10h. This is a one frame image. Note, the "noise" in the background is not a noise, there are millions of stars
This photo is a part of very large mosaic image,
can you find the WR 134 from THIS massive panorama of Northern Milky Way
WR 134, the Rising Phoenix in visual spectrum
Click for a large image, ~2500x1300 pixels
The photo is in visual colors from an ionized elements, H-alpha=red, S-II=red and O-III=blue
A Starless Image of WR 134 Animated
Click for a large image
An Animation about emission layers
Click for a large image
Click for a large image
In this animation the blue O-III channel can be seen alone without other two emission lines in image, H-alpha and S-II, and in a last frame, without other stars but WR134 visible
Technical details
Processing workflow
Image acquisition, MaximDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 27 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics, Celestron EDGE 14" with 0.7 Focal reducer
Mount, MesuMount Mark II
Cameras, Imaging camera Apogee Alta U9000M and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AO Active Optics @ 5hz
filters, Astrodon 5nm H-alpha, 3nm S-II and 3nm O-III
Total exposure time 23h
H-alpha, 15 x 1200 s, binned 1x1 = 5 h
O-III, 45x 1200 s, binned 1x1 = 15h
S-II, 9 x 1200 s. binned 2x2 = 3h
A single, full scale, 20 min O-III exposure
Click for a full scale image.
This is a dim target, 1200s O-III exposure doesn't show much about the O-III formation around the star WR 134.
This is one of the test shots after the collimation procedure. Exposure time is 1200s with 3nm O-III filter. Image is calibrated with Dark Frame and Bias corrected Flat Frame. Target is WR 134 in Cygnus. Stars are pinpoint from corner to corner. Optical analysis of this frame can be found at end of THIS blogpost
PS,
Terminator Arrives from the Future
My wife saw the new photo and pointed out, that the blue formation looks like an electric bubble used for a time traveling, as seen in a Terminator movies.
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Wednesday, October 9, 2024
FIRST LIGHT FOR MY NEW IMAGING SETUP
After a couple of years I'm able to publish a bran new photo!
This is a first light to my new imaging setup, it took couple of years to get it up and running.
I selected a relatively bright target since I wanted to test the system as soon as possible. The Pelican Nebula in constellation Cygnus, the Swan, is my first target.
The new system has a focal length of 2730mm with a massive 0.7 focal reducer for the Celestron EDGE 14" telescope. The new camera has 12 micron pixel size and it gives me an image scale of 0.91 arc seconds/pixel. (That's perfect for my seeing conditions.) The field of view spans 46.1 x 46.1 arcminutes of sky. (For a scale, Full Moon covers 30x30 arcminutes of sky)
The native resolution of the Apogee Alta U9000M camera is 3056x3056 pixels. I'm using a stacking method that doubles the measures by using the "Drizzle" while imaging. The final image is then 6112x6112 pixels.
Only five hours of light from an ionized hydrogen (H-alpha) is used for this photo. Other two color channels, O-III and S-II, are borrowed from my older long focal length photo of this target taken with Celestron EDGE 11" telescope.
Pelican Nebula
Click the photo to see a 2000x2000 pixel version
Click the image to see a full size version
This photo is in mapped colors from light from an ionized elements, hydrogen = green, sulfur=red and oxygen=blue. (H-alpha, S-II and O-III)
200% Enlarged Portion of the Full Resolution Photo
Click for a full size, 2000x2000 pixels
A Full Size H-alpha Frame
Click the image to see a full size version, 3056x3056 pixels
Click the image to see a full size version, 3056x3056 pixels
This is a stretched stack of fifteen 20min. calibrated H-alpha frames. Collimation wasn't perfect at the time so some oval stars can be seen in lower right corner. Now the collimation is under one arcseconds and the whole frame has pinpoint stars from corner to corner. (It's a large CCD, diagonal is 52mm) Optical analysis at end of this blog post,
Herbig-Haro Objects
Herbig–Haro (HH) objects are bright patches of nebulosity associated with newborn stars. They are formed when narrow jets of partially ionized gas ejected by stars collide with nearby clouds of gas and dust at several hundred kilometers per second. Herbig–Haro objects are commonly found in star-forming regions. (Source, Wikipedia)
I have labeled Herbig-Haro Objects in this closeup from my photo.
Technical details
Processing workflow
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 27 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics
Celestron EDGE 14" with 0.7 Focal reducer
Mount
MesuMount Mark II
Cameras and filters
Imaging camera Apogee Alta U9000M and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and SXV-AO Active Optics @ 6hz
Astrodon filters,
5nm H-alpha 3nm S-II and 3nm O-III
Total exposure time
H-alpha, 15 x 1200 s, binned 1x1 = 5 h (Data from new setup)
O-III, 3x 1200 s, binned 2x2 = 1h (Older data with 11" Celestron EDGE)
S-II, 3 x 1200 s. binned 2x2 = 1h (Older data with 11" Celestron EDGE
Wednesday, December 21, 2022
Milky Way, 12 years, 1250 hours of exposures and 125 x 22 degrees of sky
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It took nearly twelve years to collect enough data for this high resolution gigapixel class mosaic image of the Milky Way. Total exposure time used is around 1250 hours between 2009 and 2021.
" I can hear music in this composition, from the high sounds of sparcs and bubbles at left all the way to a deep and massive sounds at right."
From Taurus to Cygnus
Click for a large image, it's really worth it! (7000 x 1300 pixels)
Image in mapped colors from the light emitted by an ionized elements, hydrogen = green, sulfur = red and oxygen = blue. NOTE, the apparent size of the Moon in a lower left corner. NOTE 2, there are two 1:1 scale enlargements from the full size original at both ends of the image
NEW, A HD-video from Germany shows my photo in full glory
https://www.youtube.com/watch?v=D-Z60eZ4yqM
(Video in Germany but images are the international language)
Close ups form the parts of the Grande Mosaic
NEW, A HD-video from Germany shows my photo in full glory
https://www.youtube.com/watch?v=D-Z60eZ4yqM
(Video in Germany but images are the international language)
Close ups form the parts of the Grande Mosaic
Cygnus side of the mosaic, https://astroanarchy.blogspot.com/2020/12/cygnus-project-grande-finale-for-now.html
Cassiopeia side of the mosaic, https://astroanarchy.blogspot.com/2021/01/mosaic-image-gets-large-400-hours-and.html
Taurus side of the mosaic, https://astroanarchy.blogspot.com/2021/02/a-new-mosaic-image-from-taurus-to.html
A closeup from large panorama to show the overall resolution
Click for a large image
The California Nebula, NGC 1499, can be seen at bottom left of the large mosaic image.
There are about 20 million individual stars visible in the whole mosaic image.
There are about 20 million individual stars visible in the whole mosaic image.
Orientation and details
Click for a large image
Click for a large image
Imaging info
Image spans 125 x 22 degrees of the Milky About 20 million individual stars are visible in my photo!
Image spans 125 x 22 degrees of the Milky About 20 million individual stars are visible in my photo!
It took almost twelve years to finalize this mosaic image. The reason for a long time period is naturally the size of the mosaic and the fact, that image is very deep. Another reason is that I have soht most of the mosaic frames as an individual compositions and publish them as independent artworks. That leads to a kind of complex image set witch is partly overlapping with a lots of unimaged areas between and around frames. I have shot the missing data now and then during the years and last year I was able to publish many sub mosaic images as I got them ready first.
My processing workflow is very constant so very little tweaking was needed between the mosaic frames. Total exposure time is over 1250 hours. Some of the frames has more exposure time, than others. There are some extremely dim objects clearly visible in this composition, like a extremely dim supernova remnant W63, the Cygnus Shell. It lays about six degrees up from North America nebula and it can be seen as a pale blue ring. I spent about 100 hours for this SNR alone. An other large and faint supernova remnant in Cygnus can be seen at near right edge of the image. G65.5+5.7 is as large as more famous Veil nebula. There are over 60 exposure hours for this SNR alone. (Veil SNR is just outside of the mosaic area for compositional reasons but can be seen in "Detail" image above.)
My processing workflow is very constant so very little tweaking was needed between the mosaic frames. Total exposure time is over 1250 hours. Some of the frames has more exposure time, than others. There are some extremely dim objects clearly visible in this composition, like a extremely dim supernova remnant W63, the Cygnus Shell. It lays about six degrees up from North America nebula and it can be seen as a pale blue ring. I spent about 100 hours for this SNR alone. An other large and faint supernova remnant in Cygnus can be seen at near right edge of the image. G65.5+5.7 is as large as more famous Veil nebula. There are over 60 exposure hours for this SNR alone. (Veil SNR is just outside of the mosaic area for compositional reasons but can be seen in "Detail" image above.)
The Mosaic Work, technical info
I took my current toolset as a base tool since it has a relatively high resolution combined to a very large field of view. Also it collects photons very quickly since it's undersampled and I can have very dim background nebulosity visible in very short time (many times 30 min frame is enough)
I do all my mosaic work under the PhotoShop, Matching the separate panels by using stars as an indicator is kind of straight forward work. My processing has become so constant, that very little tweaking is needed between separate frames, just some minor levels, curves and color balance.
I have used lots of longer focal length sub-frames in my mosaic to boost details. (See the mosaic map at top of the page) To match them with shorter focal length shots I developed a new method.
Firstly I upscale the short focal length frames about 25% to have more room for high resolution images.Then I match the high res photo to a mosaic by using the stars as an indicator. After that I remove all the tiny stars from the high res image. Next I separate stars from low res photo and merge the starless high res data to a starless low res frame. And finally I place the removed low res stars back at top of everything with zero data lost. Usually there are some optical distortions and it's seen especially in a star field. Now all my stars are coming from a same optical setup and I don't have any problems with distortions. (I'm using the same star removal technique as in my Tone Mapping Workflow)
Closeups from large panorama to show the overall resolution
Click for a large image
IC 405 6 410 area
IC 1396
Click for a large image
Image in mapped colors from the light emitted by an ionized elements, hydrogen = green, sulfur = red and oxygen = blue.
A 1:3 resolution close up from the photo above
Click for a large image,
Click for a large image,
A closeup from the main image shows the Sharpless 124 at up and the Cocoon nebula with a dark gas stream at bottom.
Sharpless 205, NGC 1491 and Lynds Bright Nebula 696
IC 405 6 410 area
From Bubble to Cave Nebula
Image info, https://astroanarchy.blogspot.com/2020/03/from-bubble-to-cave-nebula-area.html
Not an igloo, this is reality of astro photographing in Finland
The tulip nebula area
The Tulip Nebula, Sh2-101, can be seen at center right, there is also a black hole Cygnus X-1
The blog post with technical details can be seen here, https://astroanarchy.blogspot.com/2020/10/the-tulip-nebula-in-cygnus-sh2-101.html
The blog post with technical details can be seen here, https://astroanarchy.blogspot.com/2020/10/the-tulip-nebula-in-cygnus-sh2-101.html
The supernova remnant G65.3+5.7
More info about this image here, https://astroanarchy.blogspot.com/2020/11/g65357-large-supernova-remnant-in_22.html
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